Home / 2,643.20-3,957.12-2,155.52

Finding the Fourth Proportional to 2,643.20, 3,957.12 and 2,155.52

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Solution

The fourth proportional to 2,643.20, 3,957.12 and 2,155.52 is: 3,227.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.20 : 3,957.12 = 2,155.52 : x
  2. Step 2: Convert to fraction form
    2,643.20/3,957.12 = 2,155.52/x
  3. Step 3: Cross multiply
    2,643.20x = 3,957.12 × 2,155.52
  4. Step 4: Simplify right side
    2,643.20x = 8,529,651.30
  5. Step 5: Solve for x
    x = 8,529,651.30/2,643.20
  6. Step 6: Final answer
    x = 3,227.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.